Android null pointer exception when accessing static arraylist

I have come across a bug that I cannot understand for the life of me. I have a listener the makes a webservice call and populates static arraylists from two other classes practiceRoundListActivity and qualifierRoundListActivity. So in the code below, within the foreach loop I have two conditionals which decides which arraylist the event will be inserted. The first condition "praciticeRoundListActivity.values..." works fine, but the call to "qualifierRoundListActivity.values..." does not work and I get a null pointer exception.

    public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
    if (arg2 != 0) {
        String name = (String) arg0.getItemAtPosition(arg2);
        Log.d(TAG, name);
        Team team = SpectatorActivity.map2.get(name);
        Log.d(TAG, team.getGSID());
        String url = "http://qualifiers.golfstat.com/webservices/remote.cfc?method=getEventsByGSID&GSID=";
        url += team.getGSID();
        wt.execute(url, team);
        //practiceRoundListActivity.values = new ArrayList<String>();
        //qualifierRoundListActivity.values2 = new ArrayList<String>();
        for(Event event : team.getEvents()) {
            if(event.getType() == 'p') {
                Log.d(TAG, "PR found");
                practiceRoundListActivity.values.add(event.getEventDescription() + " " + event.getTournamentDescription());
            } else if(event.getType() == 'q') {
                Log.d(TAG, "QR found");
                // //HERE IS THE BUG qualifierRoundListActivity.values.add(event.getEventDescription() + " " + event.getTournamentDescription());
            }
        }
        tabHost.setCurrentTab(1);
        tabHost.setVisibility(0);
    }
}

Being list activities, practiceRoundListActivity and qualifierRoundListActivity are attached to an arrayadapter to be displayed. I have exhausted every idea to learn something, anything about why this is happening. Most recently, since practiceRound... and qualifierRound... are so similar I copied the code for practiceRound... class into qualifierRound... and changed all the necessary names to quailifierRound...(I know these class names are annoyingly long). Thank you in advance for any help.

public class qualifierRoundListActivity extends ListActivity {

static ListView listView;
ArrayAdapter<String> adapter;
public static ArrayList<String> values;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.round_list);

    listView = getListView();
    values = new ArrayList<String>();
    adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, values);
    listView.setAdapter(adapter);
    listView.setOnItemClickListener(new OnItemClickListener() {

        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                long arg3) {
            // TODO Auto-generated method stub
            Intent intent = new Intent(getApplicationContext(), LeaderBoardActivity.class);
            startActivity(intent);
        }

    });
}

public static void setMultipleChoice() {
    listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
}

@Override
public void onPause() {
    super.onPause();
    listView.setOnItemLongClickListener(null);
}
}

Logcat: Line 154 is the "qlualifierRoundListActivity.values.add(..." line.

03-20 23:05:59.272: E/AndroidRuntime(2392): FATAL EXCEPTION: main
03-20 23:05:59.272: E/AndroidRuntime(2392): java.lang.NullPointerException
03-20 23:05:59.272: E/AndroidRuntime(2392):     at com.gstat.activities.SpectatorActivity.onItemSelected(SpectatorActivity.java:154)
03-20 23:05:59.272: E/AndroidRuntime(2392):     at android.widget.AdapterView.fireOnSelected(AdapterView.java:871)
03-20 23:05:59.272: E/AndroidRuntime(2392):     at android.widget.AdapterView.access$200(AdapterView.java:42)
03-20 23:05:59.272: E/AndroidRuntime(2392):     at android.widget.AdapterView$SelectionNotifier.run(AdapterView.java:837)
03-20 23:05:59.272: E/AndroidRuntime(2392):     at android.os.Handler.handleCallback(Handler.java:587)
03-20 23:05:59.272: E/AndroidRuntime(2392):     at android.os.Handler.dispatchMessage(Handler.java:92)
03-20 23:05:59.272: E/AndroidRuntime(2392):     at android.os.Looper.loop(Looper.java:123)
03-20 23:05:59.272: E/AndroidRuntime(2392):     at android.app.ActivityThread.main(ActivityThread.java:3683)
03-20 23:05:59.272: E/AndroidRuntime(2392):     at java.lang.reflect.Method.invokeNative(Native Method)
03-20 23:05:59.272: E/AndroidRuntime(2392):     at java.lang.reflect.Method.invoke(Method.java:507)
03-20 23:05:59.272: E/AndroidRuntime(2392):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
03-20 23:05:59.272: E/AndroidRuntime(2392):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
03-20 23:05:59.272: E/AndroidRuntime(2392):     at dalvik.system.NativeStart.main(Native Method)

So I have the qualifierRoundListActivity displayed in a tab and below is how I start it from my main class.

    public void setupTab(final View view, final String tag) {
    View tabView = createTabView(tabHost.getContext(), tag);
    TabSpec setContent = tabHost.newTabSpec(tag).setIndicator(tabView);
    Intent intent;
    if(tag == "Practice Rounds") {
        intent = new Intent(this, practiceRoundListActivity.class);
        setContent.setContent(intent);
    }
    else {
        intent = new Intent(this, qualifierRoundListActivity.class);
        setContent.setContent(intent);
    }
    tabHost.addTab(setContent);
}

private static View createTabView(final Context context, final String text) {
    View view = LayoutInflater.from(context).inflate(R.layout.tabs_small, null);
    TextView textView = (TextView) view.findViewById(R.id.tabsText);
    textView.setText(text);
    return view;
}

When I added a static method inside of the qualifier... class:

public static void add(String event) {
    values.add(event);
}

I received a null pointer exception on the values.add(event) line.